CN114122595A - Installation, replacement and maintenance method for storage battery module of direct current system of transformer substation - Google Patents
Installation, replacement and maintenance method for storage battery module of direct current system of transformer substation Download PDFInfo
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- CN114122595A CN114122595A CN202111289995.4A CN202111289995A CN114122595A CN 114122595 A CN114122595 A CN 114122595A CN 202111289995 A CN202111289995 A CN 202111289995A CN 114122595 A CN114122595 A CN 114122595A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/258—Modular batteries; Casings provided with means for assembling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/298—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the wiring of battery packs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
- H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The method for installing, replacing and maintaining the storage battery module of the direct current system of the transformer substation comprises the following specific steps: prepare the material and check, the battery discharges, the battery module equipment, battery module series connection and the battery module series module that makes up are connected with the battery cabinet, through assemble into the battery module with a plurality of batteries, battery series connection in every module, and there is state control to single battery, the quick erection joint of direct current system battery can be realized with the connection through the upper and lower combination of module, connect convenient and fast, make up in advance through the module, and test through its module control display module from the area, can accomplish fast when the installation, and can implement the state of monitoring every battery, the battery module whole change of fault earlier during the change, can resume the power supply as early as possible, reduce battery downtime, the module that gets off of change realizes repairing and reserve through the quick replacement battery.
Description
Technical Field
The invention relates to the technical field of storage batteries of transformer substations, in particular to a method for installing, replacing and maintaining a storage battery module of a direct current system of a transformer substation.
Background
The low-voltage DC system is used in hydraulic power plant, thermal power plant, transformer substation and other users using DC equipment, and is used as power supply equipment for providing DC power supply for signal equipment, protection, automatic equipment, emergency power supply, breaker on-off and switch-on. The direct current system is an independent power supply, is not influenced by a generator, plant power and a system operation mode, and ensures that a backup power supply (a storage battery) continuously provides important equipment of the direct current power supply under the condition that external alternating current is interrupted.
The existing station-use dc battery pack installation and maintenance method is to replace the battery packs and circuit connection leads stacked in the bay in the metal cabinet (as shown in fig. 13). According to the characteristic of series voltage distribution, the storage batteries with similar voltage amplitudes are placed in the same spacing layer, and the voltage amplitudes of the extreme voltages to the ground of the lower storage battery and the extreme voltages to the ground of the upper storage battery gradually increase. During replacement operation, firstly, circuit connecting wires on each storage battery need to be detached, and then each storage battery is sequentially taken down; next placing the replaced batteries in the corresponding spacer layers and restoring the circuit connecting leads of each battery; and finally, carrying out a charge-discharge test on the replaced storage battery, and carrying out wire connection and disconnection operations. The operation process can be divided into three stages of dismantling, recovering and testing, wherein each stage is operated in two steps, and six operation steps are totally performed. The dismantling and restoring of the circuit connecting wires are two steps which take the longest time, because each storage battery cabinet needs at least 18 batteries of 12V to supply power in series, and the number of the dismantled circuit connecting wires is 19 (the monitoring device connecting wires on the top of the cabinet are not included). In addition, the work of disconnecting and connecting partial circuit connecting wires is difficult to be smoothly carried out due to the internal space of the screen cabinet.
The direct-current storage battery pack installation and maintenance method designed in the above way has the following problems: firstly, the number of circuit connecting wires for replacing the storage battery is large, and more working time is consumed; the connecting and disconnecting operation of partial circuit connecting wires is difficult and has high requirements on the technical level of personnel due to the limitation of the internal space of the screen cabinet; secondly, the number of the storage batteries needing to be transported and replaced is large, the single-side screen cabinet of the general 220V direct current system at least comprises 18 12V storage batteries or 104 2V storage batteries, and correspondingly, the number of times of charge and discharge tests of the replaced storage batteries is large; and the storage battery set placed in the screen cabinet only monitors the electric quantities such as the series total voltage, the current and the like, and a real-time monitoring mechanism is lacked for the physical state of a single storage battery, so that the state of the single storage battery after replacement cannot be grasped in time, and the completion effect of replacement operation cannot be judged in real time.
There is also a conventional device for combining a secondary battery, and for example, chinese patent document CN 102800826 a describes a battery pack and a battery system, in which unit cells made of secondary batteries can be compactly connected, the unit cells can be firmly fixed to prevent displacement from each other, and wiring connection work is facilitated. However, due to the adoption of the snap-in battery stack fixing structure, the disassembly and the assembly are complex, and no feasible measure is provided for fire fighting in an emergency.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for installing, replacing and maintaining a storage battery module of a direct current system of a transformer substation, which can conveniently and quickly install and maintain the storage battery of the direct current system of the transformer substation.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the method for installing, replacing and maintaining the storage battery module of the direct current system of the transformer substation comprises the following specific steps:
preparing and counting materials; selecting a battery combination form of a storage battery module according to the voltage of a direct current system, and preparing module shells, module upper covers, module control display modules, battery state alarm display and buzzing, electrode columns, module connecting lines, storage batteries, controlled fire extinguishing devices and sensors, wherein the number of the module shells, the module upper covers, the module control display modules, the battery state alarm display and buzzing, the number of the module shells, the module upper covers, the module control display modules, the number of the module control display modules and the number of the module back-up maintenance modules are corresponding to the number of the battery modules;
discharging the storage battery; connecting the prepared storage battery with a discharging device for discharging, and disconnecting the storage battery from the discharging device after the discharging process is finished;
assembling the storage battery module:
step one, mounting components; according to the selected battery combination form, the discharged storage battery and the module shell are fixedly installed according to the set quantity proportion, the electrode column is installed at the bottom of the module shell and enables the electrode to extend out of an electrode hole in an electrode groove, the communication and power supply interface, the module control display module and the battery state alarm display and buzzing are installed on the side wall of the module shell, and the controlled fire extinguishing device and the sensor are installed at the set position;
step two, line connection; connecting the electrode column and the storage battery in the module shell by using an electric wire to form a series circuit, enabling two electrode columns of the electrode column to become positive and negative electrodes of the series circuit, electrically connecting two electrodes of a single storage battery with a detection circuit in the module control display module, and electrically connecting a communication and power supply interface, a battery state alarm display and buzzing with the module control display module;
step three, detecting the storage battery module; performing a charge-discharge test on the storage battery module which is connected by the circuit in the step two to check the state of the single storage battery, and replacing the single storage battery which does not meet the requirement until all the storage batteries are qualified;
fourthly, wiring the controlled fire extinguishing device and the sensor; electrically connecting the controlled fire extinguishing device and the sensor with the module control display module;
step five, packaging the storage battery module; covering the module upper cover on the module shell and fixing;
the storage battery modules are connected in series; a plurality of storage battery modules are combined according to the voltage of a direct current system and are placed in a storage battery cabinet, the storage battery modules are vertically stacked and combined through a positioning boss at the lower end of a module shell and a positioning groove on an upper cover of the module, and vertically adjacent storage battery modules are connected with electrode columns through module connecting wires to be connected in series;
the combined storage battery module series module is connected with the storage battery cabinet; the input and output end circuit breakers of the storage battery cabinet are guaranteed to be disconnected, two ends of the storage battery module combination which is connected in series are connected with a circuit in the storage battery cabinet, a communication and power supply interface on each storage battery module is electrically connected with a storage battery pack monitoring device on the storage battery cabinet, and the input and output end circuit breakers of the storage battery cabinet are connected;
the preparation of materials and counting, the discharge of the storage battery, the assembly of the storage battery module and the series connection of the storage battery module can be performed in advance, and the combined storage battery module series module is connected with the storage battery cabinet during installation.
The specific steps of the storage battery module replacement are as follows:
self-checking the state; when the combined storage battery module series module and the storage battery cabinet work normally, the module on the storage battery module controls the display module to monitor the state parameters of each internal single storage battery and transmit information to a storage battery pack monitoring device on the storage battery cabinet, the storage battery pack monitoring device monitors the total voltage and current of the whole series connected battery pack and transmits the state parameters of the single storage battery and the parameters of the battery pack to the direct current system monitoring device, and when the condition that a single storage battery is unqualified and needs to be replaced is detected, the battery state alarm display and buzzing are controlled to give an alarm, and the alarm is transmitted to the direct current system monitoring device through the storage battery pack monitoring device to prompt replacement;
determining a replacement module on site; the maintenance personnel receives the alarm to carry out on-site inspection, and the storage battery needing to be replaced is determined by observing the storage battery monitoring device and the module control display module on the storage battery module;
preparing before replacement; disconnecting a circuit breaker at the input and output ends of the storage battery cabinet, connecting a discharging device with a discharging switch, closing the discharging switch to discharge, observing the total voltage of a battery module on a storage battery monitoring device, finishing discharging and disconnecting the discharging switch when the total voltage is lower than the preset module warning voltage;
replacing a fault storage battery module; removing the connection between the two ends of the serially connected storage battery module combination and a circuit in the storage battery cabinet, removing a connecting wire between a storage battery module where a fault storage battery is located and an upper module and a lower module, removing a connecting cable between a communication and power supply interface and a storage battery pack monitoring device, replacing the storage battery module with a standby storage battery module, reconnecting the cable and putting into operation;
maintaining a fault storage battery module; the module upper cover of the fault battery module to be replaced is opened, the fault storage battery is disassembled, the spare storage battery is replaced, the battery is reconnected, the battery is checked through a charge-discharge test, the battery module is repaired after recovery, and the module upper cover is covered and fixed for standby.
The third step of assembling the storage battery module comprises the following specific processes:
connecting the electrode post of the accumulator module group connected by the line in the second step with an external power supply for charging, electrically connecting a control circuit switch of the external power supply with a module group control display module, controlling the charging current by the module group control display module, stopping charging when the voltage reaches the rated voltage, recording the voltage of the single accumulator after charging by the module group control display module, disconnecting the connection with the external power supply, after standing for the rated time, connecting the electrode post with a discharging device for discharging, monitoring the discharging current, the total voltage of the accumulator module group and the divided voltages of the accumulators by the module group control display module in the discharging process, detecting the divided voltages of the accumulators by the module group control display module when the total voltage of the accumulator module group is reduced to a preset alarm voltage value, when the divided voltage of the accumulator is lower than a set rated standard value threshold, judging that the single accumulator is unqualified and carrying out alarm display by the module group control display module, and continuously checking the replaced storage batteries until the storage batteries in all the storage battery modules are qualified.
The circuit in the storage battery cabinet comprises storage battery buses BAT + and BAT-, wherein storage battery input circuit breakers 1K and storage battery output circuit breakers 2K are connected to the storage battery buses BAT + and BAT-, the storage battery modules which are connected in series are connected with the storage battery buses BAT + and BAT-through storage battery fuse 12FU + and 12FU-, storage battery voltage monitoring circuits and storage battery current monitoring circuits are respectively arranged on connection loops of the storage battery fuse 12FU + and 12 FU-and the storage battery buses BAT + and BAT-, the storage battery voltage monitoring circuits and the storage battery current monitoring circuits are electrically connected with input ends of storage battery control modules, and output ends of the storage battery control modules are electrically connected with a storage battery state display screen.
The storage battery cabinet is provided with a storage battery pack state indicator lamp and a storage battery pack buzzer, and the storage battery pack state indicator lamp and the storage battery pack buzzer are electrically connected with the output end of the storage battery pack control module.
Be equipped with control chip in foretell module control display module, the control chip input detects the conversion chip output with a plurality of batteries and is connected, battery detects conversion chip and battery one-to-one to be connected through detection circuitry and battery electricity, the control chip output and battery parameter display screen, battery state warning display and buzzing are connected with controlled extinguishing device electricity, battery state warning display and buzzing are installed at module shell surface, it includes state warning light and bee calling organ.
In the preferred scheme, the positioning bosses are round tables and rectangular tables with slopes, the positioning grooves are round grooves and rectangular grooves with slopes, and the positioning bosses and the positioning grooves are matched according to the foolproof design.
In the preferred scheme, foretell electrode column is two positive and negative electrodes that set up side by side, and two electrode rear ends are connected with the support frame, support frame and module shell bottom end fixed connection, and the electrode column includes insulating parcel layer and electrode, and insulating parcel layer parcel live the electrode, and the electrode rear end stretches out the support frame and is connected with the battery both ends electricity of establishing ties, and module connecting wire slant series connection is used to upper and lower adjacent battery module.
In a preferred scheme, two positive and negative electrodes of the electrode column are arranged in an upper row and a lower row, the upper row and the lower row of positive and negative electrodes are respectively provided with two rows of electrode branches, the two rows of electrode branches are connected together at the rear ends of the electrode column, the electrode column comprises an insulating wrapping layer and electrodes, the electrodes are wrapped by the insulating wrapping layer, the rear ends of the electrodes extend out of the support frame and are electrically connected with two ends of serially connected storage batteries, and vertically connected two rows of electrodes are staggered with each other through module connecting wires to form a serially connected assembly.
In the preferred scheme, a plurality of battery right angle draw-in grooves that correspond with battery size behind the bottom surface body in the module shell, the battery is directly placed in the inslot that battery right angle draw-in groove formed.
The invention provides a method for installing, replacing and maintaining a storage battery module of a direct current system of a transformer substation, a plurality of storage batteries are assembled into the storage battery module, batteries in each module are connected in series, and the state of a single battery is monitored, the storage batteries of the direct current system can be quickly installed and connected through the up-down combination and connection of the modules, the connection is convenient and quick, the modules are combined in advance, a display module is controlled to test through the modules, the installation can be quickly finished, the state of each storage battery can be monitored, the failed storage battery module is integrally replaced during replacement, the power supply can be recovered as soon as possible, the storage battery downtime is reduced, and the replaced module is repaired and reserved by quickly replacing the storage batteries.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic view of a connection structure of a battery cabinet according to the present invention;
FIG. 2 is a schematic diagram of the circuit connections within the battery cabinet of the present invention;
FIG. 3 is a schematic view of a battery module according to the present invention;
FIG. 4 is a schematic structural diagram of a battery module according to the present invention;
FIG. 5 is a side view of the module housing;
FIG. 6 is a schematic structural view of an electrode column;
FIG. 7 is a schematic view of a preferred module housing construction;
FIG. 8 is a schematic view of a preferred electrode column configuration;
FIG. 9 is a schematic view of a preferred battery module assembly;
FIG. 10 is an electrical schematic diagram of a battery pack monitoring apparatus;
FIG. 11 shows a first electrical principle of a module-controlled display module;
FIG. 12 shows a second electrical principle of the module control display module;
fig. 13 is a schematic connection diagram of a conventional dc battery panel.
Wherein: the device comprises a storage battery module 1, a module shell 11, a module upper cover 12, an electrode groove 13, a positioning boss 14, a positioning groove 15, an electrode hole 16, a storage battery right-angle clamping groove 17, a communication and power supply interface 2, a module control display module 3, a storage battery parameter display screen 31, a control chip 32, a battery detection conversion chip 33, a battery state alarm display and buzzing 4, an electrode column 5, a support frame 51, an insulating coating layer 52, an electrode 53, a module connecting wire 6, a storage battery 7, a controlled fire extinguishing device 8, an inner concave frame 9, a sensor 10, a storage battery cabinet 20, a storage battery pack monitoring device 21, a storage battery pack state display screen 211, a storage battery pack control module 212, a storage battery pack voltage monitoring circuit 213, a storage battery pack current monitoring circuit 214, a storage battery pack state indicator lamp 22, a storage battery pack buzzer 23, a direct current system monitoring device 24, storage battery buses BAT + and BAT-), The battery input circuit breaker 1K, the battery output circuit breaker 2K, the storage battery fuse 12FU + and 12FU-, and the discharge switch 11 FQ.
Detailed Description
The technical scheme of the invention is explained in detail in the following by combining the drawings and the embodiment.
As shown in fig. 1-9, the method for installing, replacing and maintaining the storage battery module of the direct current system of the transformer substation comprises the following specific steps:
preparing and counting materials; selecting a battery combination form of the storage battery module 1 according to the voltage of a direct current system, and preparing a module shell 11, a module upper cover 12, a module control display module 3, a battery state alarm display and buzzing 4, an electrode column 5, a module connecting wire 6, a storage battery 7, a controlled fire extinguishing device 8 and a sensor 10, wherein the number of the module shell, the module upper cover 12, the module control display module 3, the battery state alarm display and buzzing 4, the number of the module connecting wires 6 and the number of the module shell are corresponding to the number of the modules;
discharging the storage battery 7; connecting the prepared storage battery 7 with a discharging device for discharging, and disconnecting the storage battery 7 with the discharging device after the discharging process is finished;
assembling the storage battery module 1:
step one, mounting components; according to the selected battery combination form, the discharged storage battery 7 and the module shell 11 are fixedly installed according to the set quantity proportion, the electrode column 5 is installed at the bottom of the module shell 11 and enables the electrode to extend out of an electrode hole 16 in an electrode groove 13, the communication and power supply interface 2, the module control display module 3 and the battery state alarm display and buzzing 4 are installed on the side wall of the module shell 11, and the controlled fire extinguishing device 8 and the sensor 10 are installed at the set position;
step two, line connection; connecting the electrode column 5 and the storage battery 7 in the module shell 11 by using an electric wire to form a series circuit, so that two poles of the electrode column 5 become positive and negative electrodes of the series circuit, and then electrically connecting two poles of the single storage battery 7 with a detection circuit in the module control display module 3, and electrically connecting the communication and power supply interface 2, the battery state alarm display and buzzing 4 with the module control display module 3;
step three, detecting the storage battery module 1; performing a charge-discharge test on the storage battery module 1 which is connected by the circuit in the step two to check the state of the single storage battery 7, and replacing the single storage batteries 7 which do not meet the requirements until all the storage batteries 7 are qualified;
step four, connecting the controlled fire extinguishing device 8 and the sensor 10; electrically connecting the controlled fire extinguishing device 8 and the sensor 10 with the module control display module 3;
step five, packaging the storage battery module 1; covering the module upper cover 12 on the module shell 11 and fixing;
the storage battery modules 1 are connected in series; a plurality of storage battery modules 1 are combined according to the voltage of a direct current system and placed in a storage battery cabinet 20, the storage battery modules 1 are vertically stacked and combined through a positioning boss 14 at the lower end of a module shell 11 and a positioning groove 15 on a module upper cover 12, and the vertically adjacent storage battery modules 1 are connected with electrode posts 5 through module connecting wires 6 to be connected in series;
the combined series module of the storage battery module 1 is connected with a storage battery cabinet 20; the input and output end circuit breakers of the storage battery cabinet 20 are guaranteed to be disconnected, the two ends of the combination of the storage battery modules 1 which are connected in series are connected with the circuit in the storage battery cabinet 20, the communication and power supply interfaces 2 on the storage battery modules 1 are electrically connected with the storage battery pack monitoring device 21 on the storage battery cabinet 20, and the input and output end circuit breakers of the storage battery cabinet 20 are closed;
the preparation of materials and counting, the discharge of the storage battery 7, the assembly of the storage battery module 1 and the series connection of the storage battery module 1 can be performed in advance, and the combined series module of the storage battery module 1 is connected with the storage battery cabinet 20 during installation.
The specific steps of the storage battery module replacement are as follows:
self-checking the state; when the combined series module of the storage battery module 1 and the storage battery cabinet 20 work normally, the module on the storage battery module 1 controls the display module 3 to monitor the state parameters of each internal single storage battery 7 and transmit information to the storage battery pack monitoring device 21 on the storage battery cabinet 20, the storage battery pack monitoring device 21 monitors the total voltage and current of the whole series battery pack, and transmits the state parameters of the single storage batteries 7 and the parameters of the battery pack to the direct current system monitoring device 24, and when detecting that a single storage battery 7 is unqualified and needs to be replaced, the battery state alarm display and buzzer 4 are controlled to give an alarm and the alarm is transmitted to the direct current system monitoring device 24 through the storage battery pack monitoring device 21 to prompt replacement;
determining a replacement module on site; the maintenance personnel receives the alarm to carry out on-site inspection, and determines the storage battery 7 needing to be replaced by observing the storage battery monitoring device 21 and the module control display module 3 on the storage battery module 1;
preparing before replacement; disconnecting the input and output end circuit breaker of the storage battery cabinet 20, connecting the discharging device with the discharging switch, closing the discharging switch to discharge, observing the total voltage of the battery modules on the storage battery pack monitoring device 21, finishing discharging and disconnecting the discharging switch when the total voltage is lower than the preset module warning voltage;
replacing the failed storage battery module 1; the connection between the two ends of the combination of the serially connected storage battery modules 1 and the circuit in the storage battery cabinet 20 is removed, the connecting line between the storage battery module 1 where the fault storage battery 7 is located and the upper module and the lower module is removed, the connecting cable between the communication and power supply interface 2 and the storage battery pack monitoring device 21 is removed, the storage battery module 1 is replaced by the standby storage battery module 1, and the cable is reconnected and put into operation;
maintaining the fault storage battery module 1; and opening the module upper cover 12 of the replaced battery module 1 with the fault, disassembling the battery 7 with the fault, replacing the battery 7 with a standby battery 7, re-wiring, performing a charge-discharge test to check whether the battery 7 is good or bad, completing repair after the battery module 1 is recovered, and covering the module upper cover 12 and fixing for standby.
Through the form that adopts the battery module, directly can detect out and send to direct current system monitoring device by module control display module 3 when 7 unqualified back of battery consume, maintainer directly changes the battery module 1 of trouble according to fault information, then can resume the connection of battery, can reduce the off-time of battery and generating line, and the battery of tearing down also can directly change according to fault information, and is convenient fast.
The third step of assembling the storage battery module 1 comprises the following specific processes:
connecting the electrode post 5 of the storage battery module 1 which is connected by the line in the step two with an external power supply for charging, electrically connecting a control circuit switch of the external power supply with a module control display module 3, controlling the magnitude of charging current through the module control display module 3, stopping charging when the voltage reaches the rated voltage, recording the voltage of the single storage battery 7 after charging by the module control display module 3, disconnecting the connection with the external power supply, after standing for the rated time, connecting the electrode post 5 with a discharging device for discharging, monitoring the discharging current, the total voltage of the storage battery module 1 and the partial voltage of each storage battery 7 by the module control display module 3 in the discharging process, when the total voltage of the storage battery module 1 is reduced to a preset alarm voltage value, detecting the partial voltage of each storage battery 7 by the module control display module 3, when the partial voltage of the storage battery 7 is lower than a set rated standard value threshold, the module control display module 3 judges that the single storage battery 7 is unqualified and carries out alarm display, and the new storage battery 7 is replaced to continue checking until the storage batteries 7 in all the storage battery modules 1 are qualified.
The discharging device can adopt an adjustable combined resistor, the display module 3 is controlled through the module to control the resistance value of the combined resistor to limit discharging current, when discharging is completed, the voltage of the single storage battery is monitored, and when the voltage value of the storage battery is lower than the rated standard value by 85%, the storage battery is an unqualified battery and needs to be replaced.
As shown in FIG. 2, the circuit inside the battery cabinet 20 includes battery buses BAT + and BAT-, battery input circuit breakers 1K and battery output circuit breakers 2K connected to the battery buses BAT + and BAT-, the battery modules 1 connected in series are connected to the battery buses BAT + and BAT-through battery pack fuses 12FU + and 12FU-, battery pack fuses 12FU + and 12 FU-and battery buses BAT + and BAT-are connected to the circuit, respectively, to have a battery pack voltage monitoring circuit 213 and a battery pack current monitoring circuit 214, the battery pack voltage monitoring circuit 213 and the battery pack current monitoring circuit 214 are electrically connected to the input end of a battery pack control module 212, the output end of the battery pack control module 212 is electrically connected to a battery pack state display screen 211, and the battery modules 1 connected in series can be directly connected to the battery modules 1 combined through the battery input circuit breakers 1K and the battery output circuit breakers 2K The circuit breaker is used for breaking the current system or disconnecting the current system from the direct current system.
As shown in fig. 1 and 10, the battery cabinet 20 is provided with a battery pack status indicator lamp 22 and a battery pack buzzer 23, which are electrically connected to an output terminal of the battery pack control module 212.
As shown in fig. 1-6, a control chip 32 is disposed in the module control display module 3, the input end of the control chip 32 is electrically connected to the output ends of a plurality of battery detection conversion chips 33, the battery detection conversion chips 33 are in one-to-one correspondence with the storage battery 7 and are electrically connected to the storage battery 7 through a detection circuit, the output end of the control chip 32 is electrically connected to the storage battery parameter display screen 31, the battery state alarm display and buzzing 4 and the controlled fire extinguishing device 8, the battery state alarm display and buzzing 4 are mounted on the outer surface of the module housing 11, and the battery state alarm display and buzzing 4 includes a state alarm lamp and a buzzer, when the voltage of the storage battery is insufficient, the battery is aged and the discharging/charging is asynchronous, the direct warning can be realized through the state alarm lamp and the buzzer, and the signal can be transmitted to the direct current system through the communication and power supply interface 2.
Fig. 11 and 12 are schematic diagrams illustrating a single storage battery connected to the control chip 32, after the storage battery is divided by resistors, the intermediate point is connected to the battery detection conversion chip 33, the battery detection conversion chip 33 detects the intermediate point voltage or current parameters and transmits the state to the control chip AT89C52 through DATA, the control chip AT89C52 displays the voltage, current or capacity of the storage battery on a storage battery parameter display screen, and can also transmit the parameters to the communication and power supply interface 2 through RXD and TXD terminals.
The preferred scheme is as shown in fig. 4, the positioning bosses 14 are circular truncated cones and rectangular platforms with slopes, the positioning grooves 15 are circular grooves and rectangular grooves with slopes, the positioning bosses 14 and the positioning grooves 15 are matched according to a foolproof design, the upper and lower storage battery modules 1 can be quickly aligned through the matching of the positioning bosses 14 and the positioning grooves 15, and the positioning bosses 14 serve as bearing platforms for placement when the storage battery modules 1 are not in a series circuit, and play a role in guiding and aligning when in series combination.
The preferred scheme is as shown in fig. 6, the above-mentioned electrode column 5 is two positive and negative electrodes that set up side by side, two electrode rear ends are connected with support frame 51, support frame 51 and 11 bottom fixed connection of module, electrode column 5 includes insulating parcel layer 52 and electrode 53, insulating parcel layer 52 wraps up electrode 53, electrode 53 rear end stretches out support frame 51 and is connected with the battery 7 both ends electricity of establishing ties, the battery module 1 that upper and lower adjacent uses module connecting wire 6 slant series connection, through the structure of electrode column 5, the connection between the battery module 1 can be accomplished in the outside, electrode 53 adopts the form of connecing soon, can be convenient to the module install and change the maintenance.
The preferable scheme is as shown in fig. 8, two rows of upper and lower settings are divided to two positive and negative electrodes of above-mentioned electrode post 5, two rows of upper and lower positive and negative electrodes are equipped with two rows of electrode branches respectively, two rows of electrode branches link together at the rear end, electrode post 5 includes insulating coating 52 and electrode 53, insulating coating 52 wraps up electrode 53, electrode 53 rear end stretches out support frame 51 and is connected with battery 7 both ends electricity of establishing ties, battery module 1 adjacent from top to bottom forms the series connection assembly through module connecting wire 6 and the crisscross vertical connection of two rows of electrodes, through the distribution structure of electrode post 5, module connecting wire 6 can vertical distribution connect, the overall arrangement is more reasonable, can take insulating block to avoid the mistake to touch on the electrode of not working a telephone switchboard.
In a preferred scheme, as shown in fig. 7, a plurality of storage battery right-angle clamping grooves 17 corresponding to the sizes of the storage batteries 7 are arranged behind the inner bottom surface of the module shell 11, and the storage batteries 7 are directly placed in grooves formed by the storage battery right-angle clamping grooves 17.
Claims (9)
1. The method for installing, replacing and maintaining the storage battery module of the direct current system of the transformer substation is characterized by comprising the following specific steps of:
preparing and counting materials; selecting a battery combination form of a storage battery module (1) according to the voltage of a direct current system, and preparing a module shell (11), a module upper cover (12), a module control display module (3), a battery state alarm display and buzzing device (4), an electrode column (5), a module connecting line (6), a storage battery (7), a controlled fire extinguishing device (8) and a sensor (10) which are in corresponding quantity and appropriate backup maintenance quantity;
discharging the storage battery (7); connecting the prepared storage battery (7) with a discharging device for discharging, and disconnecting the storage battery from the discharging device after the discharging process is finished;
assembling the storage battery module (1):
step one, mounting components; according to the selected battery combination form, the discharged storage battery (7) and the module shell (11) are installed and fixed according to the set quantity proportion, the electrode column (5) is installed at the bottom of the module shell (11) and enables the electrode to extend out of an electrode hole (16) in an electrode groove (13), the communication and power supply interface (2), the module control display module (3) and the battery state alarm display and buzzing device (4) are installed on the side wall of the module shell (11), and the controlled fire extinguishing device (8) and the sensor (10) are installed at the set position;
step two, line connection; connecting the electrode column (5) and a storage battery (7) in a module shell (11) by using an electric wire to form a series circuit, so that two electrode columns of the electrode column (5) become positive and negative electrodes of the series circuit, then electrically connecting two electrodes of a single storage battery (7) with a detection circuit in a module control display module (3), and electrically connecting a communication and power supply interface (2), a battery state alarm display and buzzing module (4) with the module control display module (3);
step three, detecting the storage battery module (1); performing a charge-discharge test on the storage battery module (1) which is connected through the circuit in the step two to check the state of the single storage battery (7), and replacing the single storage battery (7) which does not meet the requirement until all the storage batteries (7) are qualified;
fourthly, wiring the controlled fire extinguishing device (8) and the sensor (10); electrically connecting the controlled fire extinguishing device (8) and the sensor (10) with the module control display module (3);
step five, packaging the storage battery module (1); covering the module upper cover (12) on the module shell (11) and fixing;
the storage battery modules (1) are connected in series; a plurality of storage battery modules (1) are combined according to the voltage of a direct current system and placed in a storage battery cabinet (20), the storage battery modules (1) are vertically stacked and combined through a positioning boss (14) at the lower end of a module shell (11) and a positioning groove (15) on a module upper cover (12), and the vertically adjacent storage battery modules (1) are connected with electrode columns (5) through module connecting wires (6) to be connected in series;
the combined storage battery module (1) is connected with a series module and a storage battery cabinet (20); the input and output end circuit breakers of the storage battery cabinet (20) are guaranteed to be disconnected, two ends of a combination of the storage battery modules (1) which are connected in series are connected with an internal circuit of the storage battery cabinet (20), a communication and power supply interface (2) on each storage battery module (1) is electrically connected with a storage battery pack monitoring device (21) on the storage battery cabinet (20), and the input and output end circuit breakers of the storage battery cabinet (20) are closed;
the preparation of materials and counting, the discharge of the storage battery (7), the assembly of the storage battery module (1) and the series connection of the storage battery module (1) can be performed in advance, and the combined series module of the storage battery module (1) is connected with the storage battery cabinet (20) during installation.
2. The installation, replacement and maintenance method of the storage battery module of the substation direct current system according to claim 1, wherein the specific steps of the storage battery module replacement are as follows:
self-checking the state; when the combined series module of the storage battery module (1) and the storage battery cabinet (20) work normally, the module control display module (3) on the storage battery module (1) monitors the state parameters of each internal single storage battery (7) and transmits the information to a storage battery monitoring device (21) on the storage battery cabinet (20), the storage battery monitoring device (21) monitors the total voltage and current of the whole series-connected battery pack, and the state parameters of the single storage battery (7) and the parameters of the battery pack are sent to a direct current system monitoring device (24), when detecting that a single storage battery (7) is unqualified and needs to be replaced, controlling the battery state alarm display and buzzing (4) to give an alarm and sending the alarm to a direct current system monitoring device (24) through a storage battery pack monitoring device (21) for prompting replacement;
determining a replacement module on site; the maintenance personnel receive the alarm to carry out on-site inspection, and determine the storage battery (7) to be replaced by observing the storage battery monitoring device (21) and the module control display module (3) on the storage battery module (1);
preparing before replacement; disconnecting a circuit breaker at the input and output ends of the storage battery cabinet (20), connecting a discharging device with a discharging switch, switching on the discharging switch for discharging, observing the total voltage of a battery module on a storage battery monitoring device (21), finishing discharging and disconnecting the discharging switch when the total voltage is lower than the preset module warning voltage;
replacing a fault storage battery module (1); the method comprises the following steps of removing the connection between the two ends of a battery module (1) combination which is connected in series and a circuit in a battery cabinet (20), removing a connecting wire between a battery module (1) where a fault battery (7) is located and an upper module and a lower module, removing a connecting cable between a communication and power supply interface (2) and a battery pack monitoring device (21), replacing the battery module (1) with a standby battery module (1), reconnecting the cable and putting the battery module into operation;
maintaining the fault storage battery module (1); and opening the module upper cover (12) of the replaced battery module (1) with the fault, disassembling the fault storage battery (7), replacing the battery module with the spare storage battery (7), re-wiring, performing a charge-discharge test to check whether the storage battery (7) is good or not, determining that the storage battery module (1) is repaired after recovery, and covering the module upper cover (12) and fixing for standby.
3. The installation, replacement and maintenance method of the storage battery module of the substation direct current system according to claim 1, wherein the specific process of the third assembly step of the storage battery module (1) is as follows:
connecting the electrode post (5) of the storage battery module (1) which is connected by the line in the step two with an external power supply for charging, electrically connecting a control circuit switch of the external power supply with a module control display module (3), controlling the charging current through the module control display module (3), stopping charging when the voltage reaches a rated voltage, recording the voltage of the single storage battery (7) after the charging is finished by the module control display module (3), disconnecting the connection with the external power supply, after standing for the rated time, connecting the electrode post (5) with a discharging device for discharging, monitoring the discharging current, the total voltage of the storage battery module (1) and the partial voltage of each storage battery (7) by the module control display module (3) in the discharging process, and when the total voltage of the storage battery module (1) is reduced to a preset alarm voltage value, detecting the partial voltage of each storage battery (7) by the module control display module (3), when the partial voltage of the storage battery (7) is lower than the set rated standard value threshold, the module control display module (3) judges that the single storage battery (7) is unqualified and carries out alarm display, and the new storage battery (7) is replaced to continue checking until the storage batteries (7) in all the storage battery modules (1) are qualified.
4. The transformer substation direct current system storage battery module installation and replacement maintenance method according to claim 1, characterized in that an internal circuit of the storage battery cabinet (20) comprises storage battery buses BAT + and BAT-, the storage battery buses BAT + and BAT-are connected with a storage battery input breaker 1K and a storage battery output breaker 2K, the storage battery modules (1) which are connected in series are connected with the storage battery buses BAT + and BAT-through storage battery fuse 12FU + and 12FU-, the storage battery fuse 12FU + and 12 FU-and the storage battery buses BAT + and BAT-are connected with a storage battery voltage monitoring circuit (213) and a storage battery current monitoring circuit (214) respectively, the storage battery voltage monitoring circuit (213) and the storage battery current monitoring circuit (214) are electrically connected with an input end of a storage battery pack control module (212), the output end of the storage battery pack control module (212) is electrically connected with a storage battery pack state display screen (211).
5. The installation, replacement and maintenance method of the storage battery module of the substation direct current system according to claim 4, characterized in that a storage battery pack status indicator lamp (22) and a storage battery pack buzzer (23) are arranged on the storage battery cabinet (20), and the storage battery pack status indicator lamp and the storage battery pack buzzer are electrically connected with an output end of the storage battery pack control module (212).
6. The installation, replacement and maintenance method of the storage battery module of the direct-current system of the transformer substation according to claim 1, wherein a control chip (32) is arranged in the module control display module (3), the input end of the control chip (32) is electrically connected with the output ends of a plurality of battery detection conversion chips (33), the battery detection conversion chips (33) are in one-to-one correspondence with the storage batteries (7) and are electrically connected with the storage batteries (7) through a detection circuit, the output end of the control chip (32) is electrically connected with a storage battery parameter display screen (31), a battery state alarm display and buzzing device (4) and a controlled fire extinguishing device (8), and the battery state alarm display and buzzing device (4) is installed on the outer surface of a module shell (11) and comprises a state alarm lamp and a buzzer.
7. The installation, replacement and maintenance method of the storage battery module of the substation direct current system is characterized in that the positioning bosses (14) are circular truncated cones and rectangular truncated cones with slopes, the positioning grooves (15) are circular grooves and rectangular grooves with slopes, and the positioning bosses (14) and the positioning grooves (15) are matched according to a foolproof design.
8. The installation, replacement and maintenance method of the storage battery module of the substation direct current system, according to claim 1, is characterized in that the electrode posts (5) are two positive and negative electrodes arranged side by side, the rear ends of the two electrodes are connected with the supporting frame (51), the supporting frame (51) is fixedly connected with the bottom end of the module shell (11), the electrode posts (5) comprise an insulating wrapping layer (52) and electrodes (53), the electrodes (53) are wrapped by the insulating wrapping layer (52), the rear ends of the electrodes (53) extend out of the supporting frame (51) and are electrically connected with two ends of the storage batteries (7) connected in series, and the storage battery modules (1) adjacent to each other are obliquely connected in series by using the module connecting wires (6).
9. The installation, replacement and maintenance method of the storage battery modules of the substation direct current system is characterized in that two positive and negative electrodes of the electrode column (5) are arranged in an upper row and a lower row, the upper row and the lower row of positive and negative electrodes are respectively provided with two rows of electrode branches, the two rows of electrode branches are connected together at the rear ends, the electrode column (5) comprises an insulating coating layer (52) and electrodes (53), the electrodes (53) are coated by the insulating coating layer (52), the rear ends of the electrodes (53) extend out of the support frame (51) and are electrically connected with two ends of the storage batteries (7) which are connected in series, and the storage battery modules (1) which are adjacent up and down are vertically connected with the two rows of electrodes in a staggered mode through module connecting wires (6) to form a series-connected assembly.
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